Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Archives of Thermodynamics

1 2009

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: nadkrytyczny obieg Rankine'a

Sortuj według:

Ogranicz wyniki do:

Feasibility study on application of steam injectors as feedwater heaters in supercritical Rankine cycle

Trela M., Kwidziński R., Głuch J., Butrymowicz D.

Archives of Thermodynamics

2009

Vol. 30, no. 4

133-147

In the paper, a mathematical model of steam-water injector is presented. The model was used in heat balance calculations of Rankine cycle to examine the influence of novel injector feedwater heater system on efficiency of supercritical 600 MW coal-burned turbine unit. Also, the geometry of the injector system suitable for the considered Rankine cycle was determined. Analysis of cycle efficiency showed that application of steam-water injectors is most beneficial in the low pressure part of the Rankine cycle. Efficiency rise could be gained due to the absence of thermal degradation during the injector operation and due to its pumping work. Heat transfer coefficients for the injectors reach high values in the range of 190-806 kW/m[^2]K. Therefore, the heat transfer area in the system of injectors appeared to be smaller by a factor of 60 compared to equivalent shell-and-tube feedwater heaters. Size estimations of the new feedwater injectors shows that the overall dimensions and weight of the proposed injector system, consisting of several injectors connected in parallel, is significantly smaller compared to common shell-and-tube heaters. Exact proportions, however, will depend on detailed design of the entire system geometry.